TestConsole/ConsoleApp1/StringCheck/StringCheck1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1.StringCheck
{
    public static class StringCheck1
    {
        public static void Run()
        {
            var strings = File.ReadAllLines("2024-08-27.log");
            foreach (var s in strings) { 
                if (s.Contains("completed_session") && !s.Contains("PeriodEnergy"))
                {
                    Console.WriteLine(s);
                }
            }
        }

        public static string log = "";
    }
}